Seeing this application left me speechless.
It is not much I can tell about it other than data visualization on steroids. Watch and enjoy:
Now, I am pretty sure you would like to play with it yourself, so here it goes: Tag Galaxy by Stan Schroeder.
I have published this video also on my Romanian blog koolapp: web-ul viitorului. web de calitate (Koolapp: web for the future. quality web) as an exemplification of smart or just nice data visualization models.